A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

These 40,000-year-old stenciled hands are older than the famous cave art in France and Spain.

These broken shards of ancient ruin may hide an ancient pyramid.

The unique funeral practices of the Toraja can be seen here with graves carved into caves and hung off cliffs.

A real-life "hobbit" cave in Flores, Indonesia.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

Burial site of a Jewish prophet revered in Iran.

This beautiful system of tunnels built into natural rock serves as a centuries old plumbing system.

Lived-in building, bedecked with an astonishing array of mirror mosaics.

A shrine on the shores of the Tigris.

Giant reed houses made in the marshes of Southern Iraq.

A 2200 year old vessel may have been able to keep a charge.

An ancient fortified mound raised over the millennia from settlements built one on top of the other.

9th century Abbasid mosque, damaged in modern warfare.

Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

The surviving pieces of an ancient aqueduct that may have fed into the lost Hanging Gardens of Babylon.

Robot jockeys ride their humped mounts to victory as part of a 21st-century twist on an ancient desert sport.

These beautiful historic watchtowers were used for both scanning the desert for enemy invaders and observing the celestial world.

A huge museum of much more than just agriculture displayed in a princess's palace.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

Smack in the midst of coal country, this collection provides a peoples' history of Appalachian miners' heritage.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.